Some Smelter Slags Represent A Significant Environmental Hazard
...Penn Mine slag: zinc levels as high as 28 percent, copper levelsup to 6 percent, lead levels to 11 percent, cadmium levels to 1.4 percent, andarsenic levels approaching 1 percent. In 1963, a dam was built downstream of the mine. So today the reservoir itcreated, Camanche Lake, which is used for drinking wa...Children, Pets Who Swallow Post-1982 Pennies At Risk For Stomach Upset, EvenUlcers
...). Pennies minted before1982, which are 95 percent copper and 5 percent zinc, showed no erosion.However, those minted after 1982, which are nearly all zinc, with a thin copperplating, began eroding immediately. By the second day, they had holes in them.The researchers found the zinc in the coins reacted wit......sed cable economically attractive. Recycling used copper cablecurrently has high processing costs, a poor q...rgins. But using the latest process, high quality copper material can beproduced from scrap electric cable in localised recycling centres - and at alarge pro......llutants. These includedheavy metals such as zinc, copper and cobalt, as well as chemical pollutants,including pesticides, polychlorinated biphenyls and polyaromatic hydrocarbonstypically found in oily wastes. "HE-1a seemed to be the most robust and to respond to almosteverything," says Jones. It wo...Iron Deficiency Increases Likelihood Of Bone Fractures
...egs revealed that the femurs of those with iron or copper deficiency eachcontained a pocket with lower bone ... femursof the rats that were deficient in iron and copper were approximately 28percent more likely to break than those of the rats on the healthy diet. The bo...... have developed an alternative chemical based upon copper to control and initiate the stitching process. The new mediator is very cheap (900 times less expensive). It is just as efficient as the old initiator, even when the team use ten times less. The new chemical is also a catalyst which means that it ...New Materials Remove Corrosive Gas In Coal-Gasification Process
...ntssuch as zinc ferrite, zinc titanate and various copper oxides," Calsaid. "But each of these sorbents suffers from at least one major deficiencythat prevents its widespread use." Carbon offers several advantages over metal-based sorbents, Cal said."Carbon provides excellent resistance to chemical and phy...Limits Of Life On Earth: Are They The Key To Life On Other Planets?
... of life, cannot be used. The study will focus on copper and zinc isotopes expected to be abundant when these metals are taken up by microbes in a process catalyzed by enzymes, and iron isotopes expected when iron is reduced in reactions mediated by microbes. Many regions of the solar system where life i...Moving DNA Molecules With Magnetic Tweezers
...uching it. Wirtz'smagnets are three sets of coiled copper wire, each connected to apower source. The coils are positioned to produce electromagneticfields in three dimensions: backward and forward, side to side,and up and down. With a joystick, Wirtz can shift the amount ofelectricity flowing to each set of......concentrations ofpollutants such as lead, cadmium, copper and zinc. This componenttakes care of the dissolved metals. The second part of the system, a layer of porous pavementconcrete block, acts as a giant strainer. "The system is a veryeffective trap for solids that are washed off the highway," saidSansal...